Problem: The Dependabot configuration monitors Cargo and GitHub Actions
dependencies but does not track Docker base image updates. Stale base
images in the Dockerfile can accumulate unpatched vulnerabilities.
Solution: Add a Docker package-ecosystem entry to dependabot.yml that
proposes weekly base image updates, grouped by minor/patch, with a
3-PR concurrency limit. Labels (ci, dependencies) match the existing
GitHub Actions ecosystem entry for consistent triage routing.
Testing: Validated YAML syntax. Dependabot will activate automatically
on the next scheduled scan after merge.
Ref: zeroclaw-labs/zeroclaw#618 (item 1 — Dependency Update Automation)
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>